Transmitting telegraph-relay.



T. H. MAINS.

TRANSMITTING TELEGRAPH RELAY.

APPLICATION FILED SEPT.22, 1913.

1,153,937. PatentedSept. 21, 1915.

INVENTOR 7171: Mains.

WITNE88ES Kama-4. E

THANE n. MAINS, or DALLAS, TEXAS.

TRANSMITTING TELEGRAPH-RELAY.

Specification of Letterslatent.

Patented Sept. 21, 1915.

Application filed September 22, 1913. Serial No. 791,057.

T 0 all whom it may concern: 7 p

Be it known that I, THANE H. MAINS, a citizen of the United States,residing at 1207 South Harwood street, Dallas, in the county of Dallasand State of Texas, have invented certain new and useful Improve-.

ments in Transmitting Telegraph-Relays, of which the following is aspecification.

My invention relates to a transmitting telegraph relay. In the polarsystem of telegraphy, during the interval in which the tongue of atransmitting relay passes from one contact to the other, reversing theline current, the distant receiving relay will be subjected to theinfluence of currents that may be induced from adjacent wires, orcreated by certain atmospheric conditions. To avoid the influence ofsuch disturbances on the receiving relay, it is desirable to employ atransmitting relay that will operate with a maximum rapidity. It is wellknown to those familiar with this art that the polarized armature typeof relay possesses the most'rapid and positive action.

The object of my invention, therefore is to provide atransmitting'telegraph relay having a polarized armature, therebyavoiding the use of springs and securing all the advantages of apolarized relay.

Another. object is to provide a telegraph relay of the characterdescribed, that may be used as apart of the ordinary local transmission,equipment, necessitating no additional apparatus.

Finally, the object of my invention is to provide a device of thecharacter described, that will be'strong, durable, simple and efficientand comparatively easy to construct,

and also one that will not be'likely toget out i of working order.

' With these and other various objects in view, my invention hasrelation to certain novel features of construction and opera tion, anexample of which is described in the following specification andillustrated in the accompanying drawing, wherein:

Figure 1 is a top view of my relay. Fig. 2 is a view of the same in sideelevation. Fig. 3 is a view of the same in longitudinal verticalsection, the section being taken upon the line XX of Fig. 1. Fig. 4 is aview of the same in transverse, vertical section, the section beingtaken upon the line YY of Fig. 2. Fig. 5 is a diagram of the electricalconnections.

Referring now more particularly to the drawing wherein like referencecharacters designate similar parts in all the figures, the numeral 1denotes the base of my relay, which will preferably be formed of aninsulating material. To opposite edges of the base 1, there are securedthe lower edges of two vertical rectangular plates 2, preferably formedof a non-magnetic metal. Between said plates are transversely mountedthe cores 3 of two field magnets A and B, the pole pieces 4 of saidcores being preferably secured thereto by cap-screws 5 which serve alsoto give the cores a'rigid relation with the plates 2. The core 5 of apolarized magnet C is mounted preferably beneath the cores 3 andequidistant from the same, its pole pieces 6 being extended upwardly.Just above the magnet C is mounted a spindle 7 having its extremitiesrespectively journaled in the plates 2. Upon the end portions of thisspindle are mounted the up right armature members 8, the upper ends ofthe pole pieces 6 being slightly recessed to receive the lower ends ofthe members 8. The upper ends of the members 8 project between the polepieces 4, being normally attracted to one pair thereof. At the center ofthe spindle 7 is mounted fast the lower end of a substantially verticalnon-magnetic tongue 9, having a pin. 10 mounted fast in its upper end,and projecting equally at each side of the same. The upper end of thetongue 9 projects between two plates 12 surmounted upon the plates 2.Upon each of the plates 2, a contact post 13 is mounted, and in the twoposts 13 are mounted alined screws 14, between the adjacent ends ofwhich the pin 10 is disposed. The screws 14: will be so adjusted withrespect to the pin 10 as to limit the tongue 9 and spindle carrying thesame to a very slight angular dis placement in either direction.

The winding of the magnets A, B and C, and the electrical connectionsbetween said windings will now be explained. The magnet A isdifferentially wound as indicated at 15 and 16, the Winding 15 being inseries with the winding 17 of the magnet C, and the winding 16 being inseries with the winding 18 of the magnet B. A normally open key 19 isalso included in the series circuit containing the windings 16 and 18.The two series circuits 15, 17 and 16, 18 are connected in parallel in alocal circuit 20, y

energized by a battery or other source of electro-motive force. Thedifferential windings of the magnet A are so designed that theirmagnetic efi'ects neutralize each other when both windings areenergized. The windings 15 and 17 are designed when energized to formmagnets of opposite polarity, so that the armature members 8 will bevery strongly attracted to the polepieces of the magnet A when the key19 is open. \Vhen, however, the key 19 is closed, both windings of themagnet A and the windings of both magnets B and C are energized. Sincethe coil B is wound to produce a polarity opposite to that produced bythe magnet C, and since the two windings of the coil A neutralize eachother as regards magnetic eflect, when energized, it is apparent thatwhen the key 19 is closed, the pole-pieces of the magnet A will cease toattract the armature members 8, and said members will now be stronglyattracted to the pole pieces of the magnet B.

The windings of the magnets A, B and C, which have been so fardescribed, will create a magnetic attraction between the poles of themagnets A and B and the armature members 8, but magnetic repulsion isnot utilized to actuate the armature members. In order to make themovement of the armature members more rapid and positive, the coils Aand B are further wound to cause magnetic repulsion to act upon the saidmembers. The additional winding of the magnet B is a differential one,as indicated at 21 and 22, the'coil 22 being in series with the winding17 of the magnet C and constantly energized. The coil 21 is in serieswith the additional winding 23 of the magnet A, and its circuit includesthe key 19. The coils 21 and 22 are similar to the coils 15 and 16,being adapted to neutralize each other when both energized. Theelectrical connections are such that when the key 19 is open, the coil22 gives the magnet B the same polarity asthat of the magnet C, so thatthe armature members are repelled by the magnet B. When the switch 19 isclosed, the two coils 21 and 22 neutralize each other as regardsmagnetic efiect, and the coil 23 gives the magnet A the same polarity asthat of the magnet C, so that the magnet A repels the armature members.Thus it is seen that the magnet C has an unchanging polarity, while themagnets A and B are reversed in polarity each time the key 19 is closedor opened, the armature members being attracted by one of the magnets Aand B when repelled by the other. As the key 19Vis closed and opened,the armature members shift between their limiting positions(establishing contact between the pin 10 and the screws 14) with arapidity not obtain- Copies of this patent may be obtained for fivecents each, by addressing the able in any existing types of relays. Theline circuit (not shown) may be connected to "the members 14 and tongue9 in the usual well known manner.

The invention is presented as including all such modifications andchanges as properly come within the scope of the following claims.

What I claim is:

1. In a telegraph relay, the combination with a polarized magnet, ofarmature mem bers magnetized by the poles of said magnet and a pair offield magnets between which the armature members oscillate, one of thefield-magnets being differentially wound, its coils being respectivelyin series with those of the polarized magnet and other field-magnet, andthe two series circuits being in parallel with each other in anothercircuit.

2. In a telegraph relay, the combination with a polarized magnet, ofarmature members magnetized by the poles of said magnet, and a pair offield-magnets between which the armature members oscillate, one of thefield magnets being differentially wound, its coils respectively beingin series with those of the polarized magnet and other field-magnet, andtwo series circuits being in parallel with each other in anothercircuit, the polarity created by the polarized magnet winding beingopposite to that created by the winding with which it is in series, andthe polarity of the single wound field-magnet :being opposite to that ofthe polarized magnet. V

3. In a telegraph relay, the combination with a polarized magnet, ofarmature. members deriving polarity from said magnet, and a pair offield magnets between which the armature members oscillate, both fieldmagnets being differentially wound, and each carrying also an additionalwinding, the coils of each differential winding being designed toneutralize each other as regards magnetic eflect when both are energizedone coil of each diflerential winding being in circuit with thepolarized magnet winding and the other coil of the differential windingof each field magnet being in series with the additional winding of theother field magnet, and a key included in the circuits last specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

THANE H. MAINS.

Witnesses:

J. S. MURRAY, S. R. HICKMAN.

Commissioner of Patents,

Washington. D. C.

